Flue construction of gas-burning stoves or heaters.



-PATENTBD JAN. a, 190s.

. S. B. HARVEY. l TLUB CONSTRUCTION OP OAS BURNING STONES OR HBATBNS.

'APPLOATIGN FILED MAY 5, 1902.

2 SHEETS-SHEET l.

No MODEL.

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-RATRNTR'D MNO, 190s.

. s. R. HARVEY. FLOR CONSTRUCTION OP GAS BURNING STONES OR RRATRRS.

APPLICATION FILED MAY 5. 1902.

2 SHEETS-SHEET 2.

N0 MODEL,

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UNITED STATES PATENT OFFICE.

SAMUEL B. HARVEY, OF CHICAGO, ILLINOIS.

FLUE'. CONSTRUCTION OF GAS-BURNING STOVES OR HEATERS.

SPECIFICATION forming part of Letters Patent No. 717,847, dated January 6, 1903.

Application fue@ May t. 1902.

To all when@ t mrtg] concern:

Be it known Ithat I, SAMUEL B. HARVEY,

of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Flue Constructions of Gras-Burning Stoves or Heaters; and I do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part of this'specication.

This invention relates to improvements in gas-burning apparatus, and refers more specically to the flue construction of said devices for carrying away the products of combustion and directing the same to the llueoutlet.

I have shown my improvements as applied to a gas-burningwater-heater and to a gasburning stove, the latter construction being associated with the broiling and heating ovens of the stove.

The invention consists in the'matters hereinafter set forth,and more particularly pointed out in the appended claims.

In the drawings,Figure 1 is a side elevation of a stove provided with a water-heater to which my invention is applied. Fig. 2 is a horizontal longitudinal section of the Waterheater,takeu on line 2- 2of Fig. l. Fig. 3 is a vertical longitudinal section thereof, taken on line 3 3 of Fig. 2. Fig. 4 is a transverse vertical section taken on line 4 4 of Fig. 3. Fig. 5 is a vertical section, taken through a gas-stove including a broiling and'heating oven, showing myimproved flue construction applied thereto. Fig. 6 is a vertical section taken on line 6 6 of Fig. 5.

First referring to the construction of the water-heater, (shown in Figs. l to i of the drawings, )A designates as a whole a gas-bu rn-V ing stove, and B a water-heater attached at one side of the stove and at the top thereof. So far as the application of my invention to the waterheater is concerned it bears no relation to the construction of the stove proper, and such parts of the stove need not be specitically described. The application of my invention to a water-heater is shown in Figs. 2, 3, and 4, to which attention is directed in the following specific description thereof. It

Serial No. 105,903. (No modeL may be observed, however, that my improvements may be embodied in a water-heater Whether made partei" a gas stove or range or whether constructed as a separate device or apparatus. As shown in said Figs. 2,3,and 4, B B designate the side walls of the heater; B2 B3, the front and rear walls, respectively; B4,the bottom wall,and B5 the top plate,which may or may not be made part of the top plate of the stove. Contained within the lower part of the heater chamber or inclosure isa plural ity of burner-pipes C C,herein shown as three in number, which extend longitudinally from end to end thereof and are perforated in their upper sides for the emission of the gas. C' designates a transversely arranged gas supply pipe or head, from which gas is suppliedY through mixers comprising contracted discharge-nipples c,communicating with the head,and flaring nozzles or mouthpieces c on the adjacent ends of the burner-pipes. The supply of gas to said burner-pipes is controlled by means of valves c2. When the water-heater constitutes an attachment to a stove,as shown in Fig. l, the supply pipe or head C consists of a continuation of the supply-pipe A' of the stove proper. Located above said burnerpipes in position for the iiames of combustion to impinge thereon are a plurality of water -heating coils D D, which, as herein shown, have the form of iiattened coils, which are connected to form a continuous passageway for the water and provided at one end with a valved supply-pipe D' and at its other end with a valved discharge-pipe D2. B6 designates a horizontal plate constituting the top Wall of the heating and combustion chamber, in which the burner-pipes and waterpipes are contained and between which plate B6 and the top plate B5 of the heater is formed the flue space, through which escape the gaseous products ofcombustion. Said fluespace is divided by vertical partitions B7 B7, which extend between the plates B B6 into a central and two side dues b b b', respectively, and said dues communicate at the rear end of the stove with an exit-chamber BS, having a discharge-opening b2, surrounded by an annular flange, to which is adapted to be connected a pipe to carry away the products of combustion. The heating and combustion IOO chamber communicates with the ues b b through openings b4 b4 in the plate B6, which constitutes the bottom walls of the lines. The said openings b4 of the intermediate flue are all located at the front end of the iue, and the rear portion of the bottom wall of said intermediate flue is imperforate, while the openings for the outer flues b b extend from one end to the other of the flues. The purpose of so arranging the openings b4 is to prevent the accumulation of the gases of combustion at the front end of the heater` and to insure the escape of the products of combustion from all parts ofthe heating and combustion chamber uniformly. If the bottom walls of all the flu'es be perforated throughout their length, the gases of combustion tend to escape more readily through the openings at the rear ends of the flues than at the front ends thereof, whereby the gases of combustion accumulate in the front end of the heating and combustion chamber and tend to escape through the crevices of the heater to the room containing the heater. If the gas burned be natural gas, theescape thereof into the room or apartment is particularly objectionable, owing to the noxious fumes given off by the gas. By arranginginlet-openings to the ues in the manner described-that is to say, by locating all of the openings of one of the flues at the front end of the heater-a free circulation of the gases is established through said flue, which prevents the accumulation of the gases in the front end of the stove in the manner stated. This is due to the fact that the gases of combustion which pass into the front end of the intermediate iiue are not checked or impeded by the entrance of gases to said flue between said perforations and the exit-chamber B8. As a'consequence the rear or imperforate portion of the intermediate flue `is maintained highly heated, and the gases which find their way into the front end of said flue are carried by the expansion thereof rearwardly through said Hue, whereby a free circulation of the gases is established and maintained, which carries o all of the gases which collect at the front end of the heater. Obviously the same results will be attained whichever one of the flues be perforated at the front end thereof in the manner stated-that is to say, one of the side flues may be perforated at the front end thereof and be imperforate throughout the remaining portion of its length, while the intermediate fiue and the other side flue may be perforated throughout their lengths. The construction herein shown is preferable, however, as the front the arrangement of the inlet-openings to the fine is retained. The particular construction herein shown, however, is advantageous with respect to economy of construction and is hereinafter specifically claimed.

In Figs.` 5 and 6 I have shown my improved iueconstruction applied to a gas-stove for discharging the products of combustion which heat the broiling and baking ovens D D' of said stove. As shown in said figures, the burner-pipes E E are located within the broiling-oven Da and just below the door or lower wall of the baking-oven D3, and the walls of the baking-oven and the side and back walls D4 D5 are formed to provide between the same, on three sides thereof, passages d el', which communicate with a horizontal space d2, located above the baking-oven. f f designate side and intermediate lines, respectively, which are formed between upper and lower plates F F and partitions F2, said flues being substantially like the flues b b of the heater before described and communicating at their rear ends with a chamber F3, which is adapted for connection with a pipe to carry away the products of combustion from the stove. The lower walls of the side lues in this construction will desirably be perforated throughough their length, as shown at f2 in Fig. 5, as are the lower walls of the side flues of the heater before described, while onlythe front end of the lower wall of the intermediate iue is perforated, as shown at]c3 in Fig. 6. The partitions between said flues are also desirably diverged at their front ends to widen the front end of the intermediate liue, as indicated in Fig. 6. The operation of the lues in this construction is the same as that of the heater construction before described.

The construction of the top plate of the stove and the burners below the same constitute no part of the present invention and need not be herein described. l

It is obvious that changes may be made in the structural details of the flue construction herein described for adapting the same to other forms of heaters or stoves, and I do not wish to be limited to such details except as hereinafter made the subject of specific claims.

I claim as my invention- 1. In a gas-burning heater the combination with the combustion-chamber, of flues arranged side by side above said chamber and communicating at their rear ends with an exitchamber, the wall of one of said flues being perforated at the front end of said iue only to communicate with the combustion-chamber and the walls of the other ilues being perforated throughout the principal part of their length.

2. In a gas-burning heater the combination with a combustion-chamber, of at least three lines arranged side by side above said chamber, and communicating at their rear ends with an exit-chamber, the wall of the intera IOO mediate tine being perforated at the front end thereof only to communicate with the combustina-chamber, and the walls of the side fines being perforated throughout the principal part of their length.

3. In a gas-burning heater the combination with the combustion-chamber, of fines arranged side by side above said chamber and communicating at their rear ends with an exitchamber, the Wall of one of said fines being perforated at the front end of the line only to oom'lnunicate with the combustion-chamber andthe walls of the other fines being perforated throughout the principal part of their length, the front end of the first-mentioned flue, being made Wider than the other flues.

4. A gas-burning heater comprising a combustionchamber,burners located in the chamber, the top wall of said combustion-chamber being located a distance below the top plate of the heater, and vertical partitions extending between said top plate of the heater and the top wall of the combustion-chamber which divide said space into a plurality of dues, said top wall of the combustion-chamber constituting the bottoms of the fluesand being perforated to communicate with one of said dues at the front end thereof only, and perforated to communicate with the other ues throughout the principal part of their length.

5. A gas-burning heater comprising a combustionchamber,burners located in the chamof only and perforated to communicate with the other fines throughout the principal part of their length, the front ends of said partitions vbeing diverged to enlarge the front end of the intermediate iiue.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two Witnesses, this 12th day of April, A. D. 1902.

SAMUEL B. HARVEY.

Witnesses:

GERTRUDE BRYCE, EDWIN C. EWING. 

